The move comes in the same week that the lender announced that 50,000 customers had signed up for savings accounts in the two weeks since the platform, which offers a 1.5 per cent interest rate, launched.

“Marcus by Goldman Sachs is committed to the UK and we know having a personal, UK-based customer care centre is important to our customers," said Sarah Card, head of operations for Marcus, according to Reuters.

“So we’re proud to say that on the back of our successful launch we will have additional space in Milton Keynes from summer 2019 so we can continue to grow.”

RBS announced a new savings account that will offer an interest rate of 1.5 per cent, days after Goldman Sachs revealed Marcus' success.

RBS's offering is aimed at the lower end of the market, with the rate offered only in its "savings builder" accounts, with the requirement that customers deposit £50 per month.